Notify User

I've read the article entitled Notifying the User about how to create a new formatter and exception handler class. However, this doesn't allow me to override the remainder of what's displayed in the messagebox. I'm looking for a way to eliminate all the
text except a single string that I define. Is there a way to override this behavior through the combination of the config file and custom formatters/exceptions?

No takers on this question? I'm trying to eliminate all the technical content from the messagebox and just display my message. Should I do this manually with a messagebox call each time or is there any way to have this done by the exception handler?